Radar · Energy Tech in San Francisco
Best Energy Tech Companies in San Francisco, United States
The 271 best Energy Tech companies in San Francisco, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Lime.
By Rohit KhannaTrends & Stories
271companies tracked
$9.8Bdisclosed funding
6unicorns
141have raised
FLIAR INTELLIGENCE · ENERGY TECH × SAN FRANCISCO
Our analysis of 79 Energy Tech companies
$38.9b in tracked funding; 92% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
79companies analysed
92%cloud-native stacks
2025funding peak (by rounds)
12unicorns
2015median founding year
711kcombined LinkedIn audience
50%of audience held by top 3
7companies hiring publicly (12 mo)
Ranked: Best Energy Tech companies in San Francisco
| # | Company | Disclosed funding | Last round | Stage | Employees | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Lime 🦄 App-based rental platform providing self-drive electric kick-scooter 76Customers top 12%Funding top 21%Market top 26%Moat top 28% All 13 signals ▾Customerstop 12% Fundingtop 21% Markettop 26% Moattop 28% Talenttop 28% Techtop 29% Globaltop 30% Producttop 43% Innovationtop 49% Newstop 50% Partnersbottom 49% Patentsbottom 47% Growthbottom 39% Customers: Play-Store rating 4.86★ across 678,242 ratings (1 apps) · Review volume +9% in 6 mo Funding: Raised $1.7B across 9 rounds · 9 rounds over 9 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 76/100 | $1.7B | 47 mo ago | Series E | 386 | Brad Bao Co-Founder | Craft CMSApple iCloud MailGoogle Workspace+33 | 12 patents Recovering valuable particulates from kraft paper waste for recycling and resource recovery | 1 internship |
| 2 | Byton 🦄 Developer of electric SUV cars | $1.2B | 74 mo ago | Deadpooled | 1,500 | — | — | — | — |
| 3 | TeraWatt Provider of electrified transport solutions | $1.1B | 45 mo ago | Series A | 57 | Benjamin Birnbaum Co-Founder; Board Director | WebflowLeafletMapbox.js+18 | — | 1 job opening |
| 4 | Redaptive 🦄 Provider of fully-funded energy efficiency and sustainability solutions. 60Funding top 16%Moat top 26%Product top 30%Market top 37% All 9 signals ▾Fundingtop 16% Moattop 26% Producttop 30% Markettop 37% Talenttop 38% Globaltop 48% Techtop 49% Growthbottom 40% Newsbottom 21% Funding: Raised $726M across 11 rounds · 11 rounds over 11 yrs (1.0/yr) Moat: Editorial + unicorn rating 9/10 · Unicorn rank vs industry peers · Fliar Intelligence Index 60/100 | $726M | 13 mo ago | Series E | 326 | Arvin Vohra Co-Founder & CEO | WordPressMySQLPHP+27 | — | — |
| 5 | Xpansiv 🦄 Offsets and renewable energy marketplace | $712M | 41 mo ago | Series D | 277 | Joe Madden CEO | WordPressApple iCloud MailMicrosoft 365+28 | — | 3 partnerships |
| 6 | Aurora Solar 🦄 Provider of software for solar and storage system design and sales | $537M | 51 mo ago | Series D | 135 135 → 302 (+124%) | Christopher Hopper Co-Founder & CEO | WordPressApple iCloud MailGoogle Workspace+37 | 33 patents Automated 3D building modeling and estimation using computer vision and AI algorithms. | — |
| 7 | Fervo Energy Developer of next-generation geothermal projects delivering carbon-free energy 57Funding top 8%Talent top 34%News top 39%Partners top 45% All 9 signals ▾Fundingtop 8% Talenttop 34% Newstop 39% Partnerstop 45% Growthtop 47% Techtop 48% Moattop 48% Marketbottom 44% Globalbottom 39% Funding: Raised $420M across 12 rounds · 12 rounds over 5 yrs (2.4/yr) Talent: Analyst team rating 4/5 · 2 named leaders on record rank vs industry peers · Fliar Intelligence Index 57/100 | $420M | 3 mo ago | Public | 49 | Jack Norbeck Co-Founder and CTO | WordPressApple iCloud MailMicrosoft 365+25 | — | 1 launch · 3 partnerships |
| 8 | Ample 🦄 Provider of modular battery swapping for electric vehicles 69Innovation top 21%Funding top 23%Moat top 25%Patents top 26% All 9 signals ▾Innovationtop 21% Fundingtop 23% Moattop 25% Patentstop 26% Talenttop 38% Markettop 41% Growthtop 45% Globaltop 47% Techbottom 37% Innovation: 68 patents (top 29% of patent-holders) · 52 filings since 2022 vs 12 in 2017-21 Funding: Raised $280M across 5 rounds · 5 rounds over 8 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 69/100 | $280M | 18 mo ago | Series D | 173 | John Souza Co-founder & President | WordPressMySQLPHP+19 | 68 patents Battery swapping systems, thermal protection, and fastener tech for electric vehicles | — |
| 9 | SPAN Smart energy management technology platform that modernizes residential electrical systems 82Funding top 13%Innovation top 18%Patents top 20%Growth top 28% All 11 signals ▾Fundingtop 13% Innovationtop 18% Patentstop 20% Growthtop 28% Moattop 28% Producttop 35% Talenttop 38% Techtop 42% Customerstop 42% Markettop 43% Globalbottom 42% Funding: Raised $231M across 10 rounds · 10 rounds over 8 yrs (1.2/yr) Innovation: 78 patents (top 21% of patent-holders) · 64 filings since 2022 vs 14 in 2017-21 rank vs industry peers · Fliar Intelligence Index 82/100 | $231M | 5 mo ago | Series C | 220 | Jireh Seow Co-Founder | WebflowApple iCloud MailGoogle Workspace+22 | 78 patents Smart electrical panel and load management systems for residential/commercial energy control | 1 job opening |
| 10 | Particle Developer of a prototype to production connectivity platform for IoT 55Tech top 23%Funding top 24%Customers top 24%News top 30% All 12 signals ▾Techtop 23% Fundingtop 24% Customerstop 24% Newstop 30% Moattop 35% Growthtop 40% Producttop 47% Talentbottom 49% Marketbottom 47% Patentsbottom 39% Globalbottom 39% Innovationbottom 35% Tech: 67 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Funding: Raised $130M across 8 rounds · 8 rounds over 12 yrs (0.7/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $130M | 15 mo ago | Acquired | 109 109 → 110 (+1%) | Zach Supalla Co-Founder & CEO | Cart FunctionalityShopifyApple iCloud Mail+31 | 5 patents Pharma skin‑inflammation formulations, audio speaker hardware, VR headset devices, graphic‑design software. | 1 launch |
| 11 | Elroy Air Autonomous aircraft systems for cargo delivery purposes 62Growth top 18%News top 20%Funding top 27%Moat top 31% All 10 signals ▾Growthtop 18% Newstop 20% Fundingtop 27% Moattop 31% Talenttop 34% Partnerstop 40% Producttop 49% Techbottom 47% Marketbottom 40% Globalbottom 39% Growth: Headcount 18 → 48 (+167%) across vintages · Fresh capital in last 24 mo News: 6 BI events in 12 mo (of 31 tracked, 6 types) · +200% YoY rank vs industry peers · Fliar Intelligence Index 62/100 | $110M | 19 mo ago | Series B | 48 48 → 45 (-6%) | Clint Cope Chief Product Officer & Co-Founder | Apple iCloud MailGoogle WorkspaceTailwind CSS+10 | — | 2 launchs · 2 partnerships |
| 12 | Equilibrium Energy Provider of software solutions for portfolio management 60Funding top 22%Growth top 32%Talent top 38%Moat bottom 48% All 7 signals ▾Fundingtop 22% Growthtop 32% Talenttop 38% Moatbottom 48% Globalbottom 45% Marketbottom 42% Newsbottom 21% Funding: Raised $102M across 5 rounds · 5 rounds over 5 yrs (1.0/yr) Growth: Headcount 18 → 43 (+139%) across vintages · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 60/100 | $102M | 15 mo ago | Series B | 43 43 → 97 (+126%) | Kevin Clifford Co-Founder | — | — | — |
| 13 | Molekule Manufacturer of air purification and humidification devices with filtration technology 50Funding top 28%Innovation top 29%Patents top 29%Product top 34% All 13 signals ▾Fundingtop 28% Innovationtop 29% Patentstop 29% Producttop 34% Moattop 38% Techtop 41% Growthtop 45% Customerstop 50% Talentbottom 49% Marketbottom 44% Globalbottom 40% Newsbottom 36% Fin. healthbottom 29% Funding: Raised $97.9M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) Innovation: 77 patents (top 23% of patent-holders) · 39 filings since 2022 vs 38 in 2017-21 rank vs industry peers · Fliar Intelligence Index 50/100 | $98M | 13 mo ago | Public | 92 92 → 81 (-12%) | Jason Dibona CEO | ShopifyApple iCloud MailMicrosoft 365+16 | 77 patents Indoor air purification using photocatalytic and UV-based filtration technologies | — |
| 14 | Glydways Developer of electric autonomous shuttles and mass transit solutions 74News top 19%Innovation top 20%Patents top 21%Funding top 23% All 10 signals ▾Newstop 19% Innovationtop 20% Patentstop 21% Fundingtop 23% Growthtop 25% Talenttop 28% Moattop 32% Techbottom 49% Marketbottom 41% Globalbottom 40% News: 7 BI events in 12 mo (of 13 tracked, 3 types) · 6 high-value events (IPO/M&A/funding/contracts) in 12 mo Innovation: 74 patents (top 25% of patent-holders) · 66 filings since 2022 vs 8 in 2017-21 rank vs industry peers · Fliar Intelligence Index 74/100 | $96M | 9 mo ago | Series C | 76 | Zachary Zeliff Co-Founder | WordPressApple iCloud MailGoogle Workspace+20 | 74 patents Autonomous vehicle navigation, lidar perception, trajectory planning, and adaptive suspension systems | 1 launch · 1 partnership |
| 15 | Metronome Usage-based invoice management solutions for small businesses 60Funding top 24%Talent top 28%Moat top 31%Growth top 35% All 8 signals ▾Fundingtop 24% Talenttop 28% Moattop 31% Growthtop 35% Techtop 39% Marketbottom 41% Globalbottom 32% Newsbottom 20% Funding: Raised $78.0M across 4 rounds · 4 rounds over 4 yrs (1.0/yr) Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 60/100 | $78M | 15 mo ago | Acquired | 50 | Ledion Bitincka Co-Founder and CTO | WebflowSentryApple iCloud Mail+30 | — | 1 partnership |
| 16 | Sunverge Developer of smart energy storage and energy management systems | $75M | 36 mo ago | Series C | 33 | Dean Sanders Co-Founder & CTO | — | — | — |
| 17 | Lightship Manufacturers of electric recreational vehicles 55Growth top 21%Funding top 27%Moat top 31%Tech top 35% All 8 signals ▾Growthtop 21% Fundingtop 27% Moattop 31% Techtop 35% Newstop 41% Talentbottom 49% Globalbottom 37% Marketbottom 30% Growth: Headcount 1 → 28 (+2700%) across vintages · Fresh capital in last 24 mo Funding: Raised $61.2M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) rank vs industry peers · Fliar Intelligence Index 55/100 | $61M | 7 mo ago | Series B | 28 | Toby Kraus Co-Founder & CEO | PHPTailwind CSSAmazon Web Services+25 | — | 1 launch · 1 expansion |
| 18 | Leap Provider of demand response management solutions | $58M | 30 mo ago | Series B | 49 | Thomas Folker Co-Founder & CEO | Framer SitesReactAmazon Web Services+13 | 29 patents Microwave-based mobile pavement recycling and on‑site asphalt production systems | — |
| 19 | Weave Grid Developer of a platform for electric vehicle and grid integration 45Tech top 24%Talent top 28%Funding top 31%Moat top 31% All 8 signals ▾Techtop 24% Talenttop 28% Fundingtop 31% Moattop 31% Growthbottom 47% Globalbottom 39% Marketbottom 26% Newsbottom 17% Tech: 45 technologies across 6/8 capability areas · Cloud: Amazon Alb, Amazon Web Services Talent: Analyst team rating 4/5 rank vs industry peers · Fliar Intelligence Index 45/100 | $50M | 9 mo ago | Series B | 10 | — | WebflowApple iCloud MailGoogle Workspace+27 | — | 2 partnerships |
| 20 | Aether Fuels Developer of technology converting waste carbon into sustainable liquid fuels 40Funding top 23%Growth top 35%News top 46%Moat top 48% All 9 signals ▾Fundingtop 23% Growthtop 35% Newstop 46% Moattop 48% Talentbottom 49% Globalbottom 39% Marketbottom 35% Partnersbottom 35% Techbottom 32% Funding: Raised $45.4M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 40/100 | $45M | 5 mo ago | Series A | — | Conor Madigan Founder and CEO | Craft CMSApple iCloud MailMicrosoft 365+10 | — | 1 launch · 1 award |
| 21 | PolyPlus Innovating next-generation battery technology with glass-protected lithium and seawater batteries | $37M | 16 mo ago | Funding Raised | 13 | Steven Visco Chief Executive Officer and CTO | WordPressMySQLPHP+16 | — | — |
| 22 | EV Realty Provider of charging hubs for commercial electric vehicle fleets 45Growth top 23%Talent top 28%News top 29%Funding top 34% All 9 signals ▾Growthtop 23% Talenttop 28% Newstop 29% Fundingtop 34% Moattop 37% Innovationbottom 39% Patentsbottom 38% Globalbottom 31% Marketbottom 27% Growth: 1 acquisition/expansion move in 24 mo · Fresh capital in last 24 mo Talent: 3 named leaders on record · 3 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 45/100 | $28M | 7 mo ago | Series C | 13 | Sean Kiernan Co-Founder & COO | — | 13 patents Patents concentrated in chemistry & materials | 1 partnership · 1 expansion |
| 23 | Verse Provider of SaaS-based renewable energy management platform | $26M | 25 mo ago | Series A | 2 | Seyed Madaeni Co-Founder & CEO | WordPressMarkerMySQL+37 | — | 1 partnership |
| 24 | Splight Provider of AI-based transmission capacity for the grid 35AI top 35%Funding top 37%Talent bottom 49%Global bottom 48% All 6 signals ▾AItop 35% Fundingtop 37% Talentbottom 49% Globalbottom 48% Techbottom 38% Marketbottom 30% AI: Product described with: ai-based, machine learning Funding: Raised $24.4M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) rank vs industry peers · Fliar Intelligence Index 35/100 | $24M | 9 mo ago | Series A | — | Thomas Vadora Co-Founder | Framer SitesReactLenis+5 | — | — |
| 25 | Sunflower Labs Provider of AI-driven home security solutions using smart lighting and drones 62Funding top 31%Innovation top 35%Growth top 35%Patents top 36% All 11 signals ▾Fundingtop 31% Innovationtop 35% Growthtop 35% Patentstop 36% Moattop 37% Talenttop 38% Techtop 43% Newstop 44% AItop 45% Globalbottom 39% Marketbottom 34% Funding: Raised $22.1M across 5 rounds · 5 rounds over 10 yrs (0.5/yr) Innovation: 18 patents (top 54% of patent-holders) · 5 filings since 2022 vs 3 in 2017-21 rank vs industry peers · Fliar Intelligence Index 62/100 | $22M | 7 mo ago | Series B | 30 | Chris Eheim Founder + CTO | Node.jsNext.jsstyled-components+10 | 18 patents Autonomous multicopter drones for security surveillance, auto‑landing, and sensor‑network integration | — |
| 26 | Lumen Energy Provider of solutions to manage PPA 40Funding top 36%Talent top 38%Market bottom 43%Global bottom 36% All 4 signals ▾Fundingtop 36% Talenttop 38% Marketbottom 43% Globalbottom 36% Funding: Raised $16.5M · 3 rounds over 5 yrs (0.6/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 40/100 | $17M | 4 mo ago | Series A | 38 | Dave Coen Co-Founder | — | — | — |
| 27 | Tandem PV Developer of a perovskite-based solar cell | $14M | 13 mo ago | Series A | 21 | Colin Bailie Founder | Wix eCommerceWixSentry+13 | 34 patents Advanced tandem photovoltaic cells with spectral filtering and parameter‑matching for optimized power output | 1 expansion |
| 28 | Splight Artificial Energy Developer of software to increase grid capacity and enhance reliability | $14M | 23 mo ago | Funding Raised | 36 | Thomas Vadora Co-Founder & CEO | — | — | — |
| 29 | Optiwatt Charging management app for electric vehicle owners | $14M | 21 mo ago | Series A | 10 | Casey Donahue Founder & CEO | Amazon WebstoreSentryTypeScript+43 | — | — |
| 30 | Zitara Provider of cloud based and embedded battery management software | $12M | 18 mo ago | Acquired | 25 | Evan Murphy Co-Founder & CTO | WebflowVimeoAmazon Web Services+17 | — | — |
| 31 | Ammobia Technology solution for ammonia production 27Funding top 30%Talent top 38%Patents top 45%Moat top 47% All 7 signals ▾Fundingtop 30% Talenttop 38% Patentstop 45% Moattop 47% Innovationtop 49% Globalbottom 37% Marketbottom 21% Funding: Raised $11.7M across 2 rounds · 2 rounds over 2 yrs (1.0/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 27/100 | $12M | 5 mo ago | Seed | 3 | Karen Baert Co-Founder & CEO | — | 8 patents Patents concentrated in chemistry & materials | 1 partnership · 2 awards |
| 32 | Ridepanda Online retailer platform offering multi-category electric vehicles 50Tech top 27%Growth top 35%Funding top 37%Talent top 38% All 7 signals ▾Techtop 27% Growthtop 35% Fundingtop 37% Talenttop 38% Moattop 39% Globalbottom 38% Marketbottom 26% Tech: 45 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $11M | 3 mo ago | Series B | 23 | Chinmay Malaviya Co-founder and CEO | WebflowZohoAmazon Web Services+26 | — | — |
| 33 | Flair Systems Manufacturer of smart vents for home temperature control 50Tech top 26%Growth top 35%Funding top 37%Talent top 38% All 9 signals ▾Techtop 26% Growthtop 35% Fundingtop 37% Talenttop 38% Customerstop 39% Moattop 39% Producttop 46% Globalbottom 38% Marketbottom 25% Tech: 60 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 50/100 | $8M | 2 mo ago | Series B | 13 | Kenny Tay Co-Founder & CTO | ShopifyBootstrapAmazon Web Services+44 | — | — |
| 34 | Drive Powerline AI-powered solutions for connecting batteries for EVs 22Talent top 38%Funding top 44%AI top 45%Tech bottom 40% All 6 signals ▾Talenttop 38% Fundingtop 44% AItop 45% Techbottom 40% Globalbottom 36% Marketbottom 18% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Funding: Raised $7.4M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) rank vs industry peers · Fliar Intelligence Index 22/100 | $7M | 4 mo ago | Seed | 8 | Julian Lamy Co-Founder & Chief Technology Officer | Framer SitesUIKitReact+8 | — | — |
| 35 | Material Developer of 3D printing technology for full-stack battery manufacturing | $7M | 4 mo ago | Seed | — | Gabe Elias Co-Founder & CEO | WordPressMySQLPHP+16 | — | 1 award |
| 36 | TrueMeter Provider of AI utility bill management for multi-site businesses | $6M | 12 mo ago | Seed | — | Ozge Islegen-Wojdyla Co-Founder & CTO | WebflowRiveAmazon Web Services+23 | — | 1 award |
| 37 | SkyCool Systems Provider of radiative cooling systems | $5M | 12 mo ago | Seed | 11 | Eli Goldstein CEO | WordPressMySQLPHP+21 | — | 1 award |
| 38 | EnZinc Developer of rechargeable zinc anode batteries | $4M | 18 mo ago | Series A | 15 15 → 23 (+53%) | Deborah Knuckey Co-Founder & CMO | WordPressMySQLPHP+17 | — | 1 launch |
| 39 | Pila Energy Developer of home battery systems providing backup power and energy management | $4M | 7 mo ago | Seed | — | Cole A Founder & CEO | Cart FunctionalityShopifyTailwind CSS+19 | — | 1 award |
| 40 | Cosmic Robotics Provider of robotics technology services for construction | $4M | 14 mo ago | Seed | — | James Emerick Co-Founder & CEO | WebflowGSAPLenis+10 | — | 1 partnership |
| 41 | HomeBoost Online platform providing home energy assessment solutions | $4M | 19 mo ago | Seed | — | Adam Sussman Co-Founder | WordPressMySQLPHP+31 | — | 1 job opening |
| 42 | Emobi AI-powered station management solutions for station operators 40Funding top 29%AI top 45%Talent bottom 49%Market bottom 37% All 5 signals ▾Fundingtop 29% AItop 45% Talentbottom 49% Marketbottom 37% Globalbottom 29% Funding: Raised $3.9M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) AI: Product described with: ai-powered rank vs industry peers · Fliar Intelligence Index 40/100 | $4M | 4 mo ago | Seed | — | Lin Fa Founder & CEO | — | — | 1 partnership |
| 43 | Current Software Developer of billing software that automates processes and provides real-time analytics | $4M | 8 mo ago | Series A | — | Jin Ong Co-Founder & CTO | Node.jsRadix UIReact+15 | — | — |
| 44 | Station A Provider of project developer recommendations using software tools and machine learning | $3M | 12 mo ago | Series B | 11 | Jeremy Lucas Co-Founder & Head of Engineering | — | 34 patents Identity access management workflow automation and automated spray dispensing systems | 1 job opening |
| 45 | Tyba Provider of solar power plant management platform | $2M | 16 mo ago | Series A | 9 | Tyler Nisonoff Co-Founder & CTO | WordPressMySQLPHP+33 | — | — |
| 46 | InviscidAI Developer of physics-informed artificial intelligence platform for building system optimization | $500K | 5 mo ago | Seed | — | Kabir Jain Co-Founder | — | — | — |
| 47 | RoboDock Developer of robotic charging systems for electric and autonomous vehicle fleets | $500K | 5 mo ago | Seed | — | Celine Wang Co-Founder & CTO | — | — | — |
| 48 | Voxel Energy Developer of data centers powered by solar energy and EV batteries | $500K | 5 mo ago | Seed | — | Max Pfeiffer Co-Founder & CTO | — | — | — |
| 49 | Verne Provider of rapid electricity deployment solutions for industrial power needs | $500K | 5 mo ago | Seed | — | David Jaramillo Co-Founder & CTO | — | 25 patents Cryo‑compressed hydrogen storage vessels with thermal management and composite overwrap systems | — |
| 50 | Cambio Provider of a real estate sustainability platform | $125K | 4 mo ago | Series A | 7 | Elvis Wong Co-Founder | WebflowAmazon Web ServicesCloudflare Turnstile+19 | — | — |
Top 12 Energy Tech companies in San Francisco
#1
Public · San Francisco, California · founded 2017 · 49 employees$420.2Mraised▾
Public · San Francisco, California · founded 2017 · 49 employees
Developer of next-generation geothermal projects delivering carbon-free energy. It pioneers a new approach to geothermal energy using technologies like horizontal drilling and distributed fiber optic sensing to unlock geothermal resources. It focuses on making geothermal energy a scalable resource and ensures environmental health and safety in its operations. The company aims to decarbonize challenging parts of the electricity sector through geothermal energy.
Fliar Intelligence Index™ 57how this company ranks against its industry peers
Funding
top 8%Talent
top 34%News
top 39%Partners
top 45%Growth
top 47%Tech
top 48%Funding: Raised $420M across 12 rounds · 12 rounds over 5 yrs (2.4/yr) · Last round Conventional Debt (Mar 2026)
Talent: Analyst team rating 4/5 · 2 named leaders on record · 2 C-suite/founder profiles curated
News: 9 BI events in 12 mo (of 26 tracked, 4 types) · -31% YoY · 8 high-value events (IPO/M&A/funding/contracts) in 12 mo
Audience (LinkedIn): 68k LinkedIn followers — 9.6% of this cohort's audience
Activity (LinkedIn): 1 product launches · 3 partnerships (incl. Enhanced Geothermal Systems Deployment Coalition (EGS DC)) announced in 12 mo
Funding rounds
- Mar 2026Conventional Debt$421M
- Dec 2025Series E$462M
- Jun 2025Conventional Debt$105.5M
- Jun 2025Series D$100M
Founders & team
Investors
Breakthrough Energy, Capricorn, 3x5 Partners, Helmerich & Payne, Elemental, DCVC
Tech stack
Apple Icloud MailCloudflareCloudflare Bot ManagementCore-JsElementorFancybox
#2
Series C · San Francisco, California · founded 2014 · 220 employees$231Mraised▾
Series C · San Francisco, California · founded 2014 · 220 employees
Smart energy management technology platform that modernizes residential electrical systems. Its solutions replace traditional electrical panels with smart systems that provide homeowners with real-time visibility into household energy usage, circuit-level monitoring, and remote control of appliances and connected devices. It is designed to support modern electrified homes by integrating technologies such as home batteries, electric vehicle chargers, solar systems, HVAC systems, and heat pumps into a centralized energy management ecosystem.
Fliar Intelligence Index™ 82how this company ranks against its industry peers
Funding
top 13%Innovation
top 18%Patents
top 20%Growth
top 28%Moat
top 28%Product
top 35%Funding: Raised $231M across 10 rounds · 10 rounds over 8 yrs (1.2/yr) · Last round Series C (Jan 2026)
Innovation: 78 patents (top 21% of patent-holders) · 64 filings since 2022 vs 14 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 78 patents matched (strict assignee match) · 64 filings since 2022 vs 14 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 35k LinkedIn followers — 5.0% of this cohort's audience
Hiring (LinkedIn): 1 hiring post in 12 mo (public)
Funding rounds
- Jan 2026Series C$163.3M
- Sep 2025Series B$25M
- Jun 2025Grant (prize money)$999.8K
- Apr 2025Grant (prize money)$999.8K
Founders & team
Investors
ArcTern Ventures, Capricorn, Incite, One Zero Capital, Wireframe Ventures, Ulu Ventures
Tech stack
AccessibeAhrefsApple Icloud MailAuraBootstrapCloudflare
#3
Series E · San Francisco, California · founded 2015 · 326 employees$726.5Mraised▾
Series E · San Francisco, California · founded 2015 · 326 employees
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Fliar Intelligence Index™ 60how this company ranks against its industry peers
Funding
top 16%Moat
top 26%Product
top 30%Market
top 37%Talent
top 38%Global
top 48%Funding: Raised $726M across 11 rounds · 11 rounds over 11 yrs (1.0/yr) · Last round Conventional Debt (May 2025)
Moat: Editorial + unicorn rating 9/10 · Unicorn · 10 curated direct competitors tracked
Product: 2 published apps (1.2k installs) · Company stage: Series E
Audience (LinkedIn): 70k LinkedIn followers — 9.9% of this cohort's audience
Funding rounds
- May 2025Conventional Debt$650M
- Oct 2024Series E$100M
- Aug 2023Conventional Debt$125M
- Mar 2023Series E$250M
Founders & team
Investors
AB CarVal, CBRE, ENGIE New Ventures, Evergy Ventures, Linse Capital, CPP Investments
Tech stack
Amazon Web ServicesCdnjsCloudflareCloudflare Bot ManagementContentsquareCore-Js
#4
Series A · San Francisco, California · founded 2022$45.4Mraised▾
Series A · San Francisco, California · founded 2022
Developer of technology converting waste carbon into sustainable liquid fuels. The company’s technology economically converts waste carbon into liquid fuels. It enables industries to achieve net zero goals through carbon conversion efficiency. The technology converts carbon from multiple sources without requiring extra steps or equipment.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
Funding
top 23%Growth
top 35%News
top 46%Moat
top 48%Talent
bottom 49%Global
bottom 39%Funding: Raised $45.4M across 3 rounds · 3 rounds over 3 yrs (1.0/yr) · Last round Series A (Jan 2026)
Growth: Web rank 50,000,000 → 10,000,000 YoY · Fresh capital in last 24 mo
News: 4 BI events in 12 mo (of 12 tracked, 4 types) · +0% YoY · Top themes: Contracts, Funding, Incorporation
Audience (LinkedIn): 8k LinkedIn followers
Activity (LinkedIn): 1 product launches · 1 awards announced in 12 mo
Funding rounds
- Jan 2026Series A$15M
- Mar 2025Series A—
- Jun 2024Series A$36.9M
- Dec 2023Seed$8.5M
Founders & team
Investors
JetBlue Technology Ventures, TechEnergy Ventures, Doral Energy Group, Foothill Ventures, Xora Innovation, AP Ventures
Tech stack
Apple Icloud MailBunnyCloudflareCraft CmsGodaddyHsts
#5
Series B · San Francisco, California · founded 2020 · 28 employees$61.2Mraised▾
Series B · San Francisco, California · founded 2020 · 28 employees
LightShip is a manufacturer of electric recreational vehicles. The company is involved in designing and producing aerodynamic, battery-powered trailers and RVs.
Fliar Intelligence Index™ 55how this company ranks against its industry peers
Growth
top 21%Funding
top 27%Moat
top 31%Tech
top 35%News
top 41%Talent
bottom 49%Growth: Headcount 1 → 28 (+2700%) across vintages · Fresh capital in last 24 mo
Funding: Raised $61.2M across 4 rounds · 4 rounds over 5 yrs (0.8/yr) · Last round Series B (Nov 2025)
Moat: Editorial + unicorn rating 8/10 · Soonicorn · 9 curated direct competitors tracked
Audience (LinkedIn): 16k LinkedIn followers — 2.2% of this cohort's audience
Activity (LinkedIn): 1 product launches · 2 expansions announced in 12 mo
Funding rounds
- Nov 2025Series B$26.6M
- Nov 2023Series B$34.1M
- Jul 2022Series A$23M
- Jul 2021Series A$4.1M
Founders & team
Investors
Obvious Ventures, Congruent Ventures, MCJ Collective, HyperGuap, Alumni Ventures, Prelude Ventures
Tech stack
Amazon S3Amazon Web ServicesCloudflareCloudflare Bot ManagementCloudflare Browser InsightsCore-Js
#6
Series C · San Francisco, California · founded 2016 · 76 employees$96.3Mraised▾
Series C · San Francisco, California · founded 2016 · 76 employees
Gldyways is a developer of electric autonomous shuttles and mass transit solutions. The company offers an on-demand transit system that provides pathways with small autonomous electric shuttles running on a narrow fixed guideway. Also, it offers design, manufacture, installation, and operation of autonomous transportation solutions. The photovoltaics embedded into the infrastructure to offer eco-friendly, optimized traffic free-rides to users.
Fliar Intelligence Index™ 74how this company ranks against its industry peers
News
top 19%Innovation
top 20%Patents
top 21%Funding
top 23%Growth
top 25%Talent
top 28%News: 7 BI events in 12 mo (of 13 tracked, 3 types) · 6 high-value events (IPO/M&A/funding/contracts) in 12 mo · Top themes: Funding, Capital raise
Innovation: 74 patents (top 25% of patent-holders) · 66 filings since 2022 vs 8 in 2017-21 · Deep-tech classification: Tech Hardware
Patents: 74 patents matched (strict assignee match) · 66 filings since 2022 vs 8 in 2017-21 · Latest publication 2026
Audience (LinkedIn): 11k LinkedIn followers
Activity (LinkedIn): 1 product launches · 1 partnerships (incl. Sushi) announced in 12 mo
Funding rounds
- Aug 2025Series C$170M
- May 2024Series B—
- Aug 2023Series B$56M
- Dec 2021Series B$5.3M
Founders & team
Investors
Global Suzuki, New Science Ventures, Grupo ACS, Gates Frontier, Khosla Ventures, MITSUI CHEMICALS
Tech stack
Alpine.JsAmazon Web ServicesApple Icloud MailCloudflareCloudflare Bot ManagementCookieyes
#7
Series B · San Francisco, California · founded 2014 · 13 employees$7.6Mraised▾
Series B · San Francisco, California · founded 2014 · 13 employees
Manufacturer of home automation devices for temperature control. Its device is equipped with Bluetooth, sensors. The vent works with existing internet-connected thermostats to adjust the temperature in individual rooms being used, using occupancy sensors and historical occupancy data. It can also be paired with existing connected cooling units to control temperature. Its systems can be controlled via smartphones, tablets, and smartwatches.
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Tech
top 26%Growth
top 35%Funding
top 37%Talent
top 38%Customers
top 39%Moat
top 39%Tech: 60 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Devops: Envoy
Growth: Fresh capital in last 24 mo
Funding: Raised $7.6M across 4 rounds · 4 rounds over 11 yrs (0.4/yr) · Last round Series B (Mar 2026)
Funding rounds
- Mar 2026Series B—
- Dec 2024Series A—
- Sep 2022Series A$7.6M
- Feb 2022Seed$108.5K
Founders & team
Investors
HAX, Active Impact Investments, Lowercarbon Capital, SOSV, Skyview Capital, Resilience Capital Partners
Tech stack
Amazon PayAmazon S3Amazon SesAmazon Web ServicesAmerican ExpressApple Pay
#8
Series B · San Francisco, California · founded 2020 · 23 employees$11.2Mraised▾
Series B · San Francisco, California · founded 2020 · 23 employees
Online retail platform offering multi-category electric vehicles. The platform enables users to get various electric vehicles like kick scooters, mopeds, bikes, and more by attending quiz based on the results it recommends vehicles to users. It offers various services like maintenance, advocacy, financial benefits, and more.
Fliar Intelligence Index™ 50how this company ranks against its industry peers
Tech
top 27%Growth
top 35%Funding
top 37%Talent
top 38%Moat
top 39%Global
bottom 38%Tech: 45 technologies across 5/8 capability areas · Cloud: Amazon S3, Amazon Web Services · Observability: Sentry
Growth: Fresh capital in last 24 mo
Funding: Raised $11.2M across 3 rounds · 3 rounds over 5 yrs (0.6/yr) · Last round Series B (Mar 2026)
Audience (LinkedIn): 3k LinkedIn followers
Funding rounds
- Mar 2026Series B$12.6M
- Mar 2026Conventional Debt—
- Nov 2023Series A$7.5M
- Nov 2023Conventional Debt—
Founders & team
Investors
Proeza Ventures, General Catalyst, Porsche Ventures, Alumni Ventures, Karman, Utopian
Tech stack
Amazon S3Amazon Web ServicesCdnjsCloudflareCloudflare Bot ManagementCore-Js
#9
Series A · San Francisco, California · founded 2019 · 38 employees$16.5Mraised▾
Series A · San Francisco, California · founded 2019 · 38 employees
Provider of solutions to manage PPA. It provides personalized power purchase agreements (PPAs) across your entire portfolio.
Fliar Intelligence Index™ 40how this company ranks against its industry peers
Funding
top 36%Talent
top 38%Market
bottom 43%Global
bottom 36%Funding: Raised $16.5M · 3 rounds over 5 yrs (0.6/yr) · Last round Series A (Feb 2026)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Market: 38 employees
Audience (LinkedIn): 4k LinkedIn followers
Founders & team
Investors
Ajax Strategies, Lowercarbon Capital, Designer Fund, Bridge Investment Group, Nuveen, Climate Capital
#10
Series B · San Francisco, California · founded 2018 · 10 employees$50Mraised▾
Series B · San Francisco, California · founded 2018 · 10 employees
Developer of a platform for electric vehicle and grid integration. The platform offers utilities visibility and control of local grid capacity. It aligns electric loads with network capacity by optimizing device charging schedules. The platform supports renewable energy integration and affordable electrification. It mitigates challenges with distributed load flexibility.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Tech
top 24%Talent
top 28%Funding
top 31%Moat
top 31%Growth
bottom 47%Global
bottom 39%Tech: 45 technologies across 6/8 capability areas · Cloud: Amazon Alb, Amazon Web Services · Devops: Envoy
Talent: Analyst team rating 4/5
Funding: Raised $50.0M across 3 rounds · 3 rounds over 8 yrs (0.4/yr) · Last round Series B (Sep 2025)
Audience (LinkedIn): 16k LinkedIn followers — 2.3% of this cohort's audience
Activity (LinkedIn): 2 partnerships (incl. AEP Public Service Company of Oklahoma) announced in 12 mo
Funding rounds
- Sep 2025Series B—
- Jan 2025Series B—
- Dec 2024Conventional Debt—
- Dec 2024Series B$28M
Investors
The Westly Group, Breakthrough Energy, Coatue, Grok Ventures, Plug and Play Tech Center, Collab Fund
Tech stack
Amazon AlbAmazon Web ServicesApple Icloud MailAwinCloudflareCloudflare Bot Management
#11
Series B · San Francisco, California · founded 2016 · 30 employees$22.1Mraised▾
Series B · San Francisco, California · founded 2016 · 30 employees
Provider of AI-driven home security solutions using smart lighting and drones. The smart lights are integrated into a stick form factor that also contains motion sensors to detect intruders. The stick can be stuck on the grounds of a house and when a trespasser is detected. When unusual activity is detected, the companion drone can be sent to collect video. The drone is a quadcopter that flies autonomously and records video using a combined IR and optical camera.
Fliar Intelligence Index™ 62how this company ranks against its industry peers
Funding
top 31%Innovation
top 35%Growth
top 35%Patents
top 36%Moat
top 37%Talent
top 38%Funding: Raised $22.1M across 5 rounds · 5 rounds over 10 yrs (0.5/yr) · Last round Series B (Nov 2025)
Innovation: 18 patents (top 54% of patent-holders) · 5 filings since 2022 vs 3 in 2017-21 · Deep-tech classification: Tech Hardware
Growth: Fresh capital in last 24 mo
Audience (LinkedIn): 6k LinkedIn followers
Funding rounds
- Nov 2025Series B$16M
- Dec 2023Series A$1.5M
- Jan 2022Series A$15M
- 2019Seed—
Founders & team
Investors
General Catalyst, Stanley Ventures, Gentian Investments, Drone Fund, All Turtles, Pbfs.com
Tech stack
Framer SitesGoogle MapsGoogle Tag ManagerGoogle WorkspaceHstsHttp/3
#12
Series C · San Francisco, California · founded 2021 · 13 employees$28Mraised▾
Series C · San Francisco, California · founded 2021 · 13 employees
Provider of charging hubs for commercial electric vehicle fleets. The company offers dedicated stalls with reserved access and on-route charging options. The charging system adjusts to vehicle schedules, providing power based on need. It designs charging infrastructure to support businesses and their customers.
Fliar Intelligence Index™ 45how this company ranks against its industry peers
Growth
top 23%Talent
top 28%News
top 29%Funding
top 34%Moat
top 37%Innovation
bottom 39%Growth: 1 acquisition/expansion move in 24 mo · Fresh capital in last 24 mo
Talent: 3 named leaders on record · 3 C-suite/founder profiles curated
News: 5 BI events in 12 mo (of 6 tracked, 4 types) · +400% YoY · 1 high-value events (IPO/M&A/funding/contracts) in 12 mo
Audience (LinkedIn): 5k LinkedIn followers
Activity (LinkedIn): 1 partnerships · 1 expansions (incl. Ava Community Energy) announced in 12 mo
Funding rounds
- Nov 2025Series C—
- Sep 2025Series C$75M
- Nov 2022Series B$28M
Founders & team
Investors
Segue Sustainable Infrastructure, Fifth Wall, Broadscale Group, Alpaca, NGP, Outpost
Funding & investor landscape
$9.8Btotal disclosed funding
140companies funded
382disclosed rounds
1rounds last 90 days
Most active investors
Y Combinator17 rounds
Notable founders
Jack Norbeck
Co-Founder and CTO · Fervo Energy
Tim Latimer
Co-Founder · Fervo Energy
Jireh Seow
Co-Founder · SPAN
Arch Rao
Founder & CEO · SPAN
Arvin Vohra
Co-Founder & CEO · Redaptive
Manesh Shah
Chief Administrative & Legal Officer · Redaptive
Conor Madigan
Founder and CEO · Aether Fuels
Toby Kraus
Co-Founder & CEO · Lightship
Zachary Zeliff
Co-Founder · Glydways
Mark Seeger
Co-Founder & CEO · Glydways
Kenny Tay
Co-Founder & CTO · Flair Systems
Daniel Myers
Co-Founder & CEO · Flair Systems
Prism market signals · United States · country-scoped Prism corpus, 2,119,908 docs
Market landscape — 10 sub-themes by coverage
Share of Energy Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH SIGNALS · United States
How research on Grid Energy Storage is moving in the United States
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 5,941 United States-affiliated papers.
research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and softening — the enthusiastic (strongly-positive) share moved 60% → 57% across 2008–2026.
top research entities
- Electric Power Research Institute204
- Pacific Northwest National Laboratory202
- Argonne National Laboratory193
- Northeastern University151
- Massachusetts Institute of Technology124
leading researchers
Arumugam Manthiram · Vlachokostas, Alex · Di Wu · Yi Cui · Yury Gogotsi · Wei Wang · Freederia AI Researcher · Guihua Yu
▲
Breakthroughs1,937 · 33%
▼ 34%→32% share
▼0.9× share momentum1 median citations83% since 2021mostly methods-led
Electrolyte breakthroughs are surging — U.S. papers rose from 37 to 318, with Interphase newly emerging at 28.
rising sub-themes (early→recent)
- Battery (electricity)57→359
- Electrolyte37→318
- Electrochemistry30→240
- Cathode32→224
- Anode37→209
Newly emergingEnergy (signal processing) 0→87 · Thermal 0→34 · Interphase 0→28
Landmark Challenges and Prospects of Lithium–Sulfur Batteries · 2,319 cites
◆
Advancements2,724 · 46%
▲ 40%→48% share
▲1.2× share momentum1 median citations87% since 2021mostly methods-led
Renewable energy advancement research is intensifying — U.S. papers grew from 40 to 492, driving field-share to 48%.
rising sub-themes (early→recent)
- Renewable energy40→492
- Battery (electricity)59→507
- Power (physics)8→227
- Electrolyte27→244
- Electrochemistry37→240
Newly emergingNuclear engineering 0→34 · Ionic conductivity 0→30 · Efficient energy use 0→30
Landmark Sodium‐Ion Batteries · 4,393 cites
▼
Concerns798 · 13%
▼ 14%→13% share
▼0.9× share momentum2 median citations80% since 2021mostly reviews
Battery degradation concerns are rising — Battery (electricity) concern papers increased from 35 to 184 in U.S. research.
rising sub-themes (early→recent)
- Battery (electricity)35→184
- Renewable energy24→156
- Electrolyte13→114
- Electrochemistry10→80
- Cathode9→72
Newly emergingDegradation (telecommunications) 0→21 · Sustainable energy 0→20 · Reliability (semiconductor) 0→19
Landmark Pseudocapacitive oxide materials for high-rate electrochemical energy storage · 5,233 cites
RESEARCH HOTSPOTS · United States
Where energy storage is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
SF Bay Area353 · +0.50
Boston340 · +0.51
Austin119 · +0.42
Atlanta118 · +0.59
Los Angeles108 · +0.58
New York105 · +0.53
Chicago86 · +0.58
San Diego83 · +0.53
Ann Arbor62 · +0.46
Philadelphia61 · +0.47
PATENT SIGNAL · United States
Who's filing energy storage patents in the United States
United States energy storage patent filing is accelerating — 8,522 filings from 3,681 assignees (2016–2025), led by General Electric, ESS Technology, GM Global TECH Operations; annual filings 687→1058.
8,522 filings3,681 assigneespeak 1092/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
- General Electric592
- ESS Technology276
- GM Global TECH Operations233
- Fastcap Systems205
- UNIV California180
- Rondo Energy157
- United Technologies154
- Battelle Memorial Institute146
Common questions
How many Energy Tech companies are there in San Francisco, United States?
Radar tracks 271 indexable Energy Tech companies headquartered in San Francisco, United States that meet our profile-completeness bar.
What is the total funding raised by Energy Tech companies in San Francisco, United States?
The Energy Tech companies in San Francisco, United States on this list have raised a combined $9.8B in disclosed equity funding across 140 funded companies.
Which is the highest-funded Energy Tech company in San Francisco, United States?
Lime is the highest-funded Energy Tech company in San Francisco, United States, with $1.7B in disclosed equity funding.
How many Energy Tech companies in San Francisco, United States are funded?
140 of the 271 Energy Tech companies in San Francisco, United States on this list have disclosed at least one equity funding round.
How many Energy Tech unicorns are there in San Francisco, United States?
6 Energy Tech companies in San Francisco, United States on this list are valued at $1B or more.
Who are the top investors in San Francisco, United States Energy Tech companies?
The most active investors in San Francisco, United States Energy Tech companies on this list include Climate Capital, Y Combinator, Collab Fund, Elemental, OSTI.
Rohit KhannaTrends & Stories
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.